Boom-hoist structure for excavating machines



G. A. VAUGHN 1,708,598 BOOM HOIST STRUCTURE FOR EXCAVATING MACHINES Filed Sept. 30. 1926 2 Sheets-Sheet l April 9, 1929.

April 9, 1929 G. A. VAUGHN 1,708,598

BOOM HOISI STRUCTURE FOR EXCAVATING MACHINES @New i er e a?. azz /zz if i y www/1196 Patented Apr. l?,Y 1929.

UNITED PATENT OFFICE.

GEORGE A. FIAUGHN, OF NEVLTTON, IOWA, ASSIGNOR-'IIO THE PARSONS COMPANY, OF

i A NEWTON, IOWA.

BOOM-H0151 STRUCTURE FOR EXOAVATING MACHNES.

Application filed September S0, 1926. Serial No. 138,646.

to provide a 'for Y excavatdurable and ivhereol lover position, i will likewise he tilted from Ythe inclinedpo "on which it had when use to apos'tionxmore nearly horizontal, thus relatively-re' L the lower end transport-ation over the ground,

With these and other objects in view7V my vention consists inthe construction, arngement and combination et the various An' novel features of structure,

for 'l'or i; chine equipped with cture embodying my inve Y i sectional i ten" taken on 2 2- of Figure 1, certain details of an enlarged, detail, sectional ing the clutch structure and of Figure 1. det-ail, sectional viev.7 taken n the lin 4 4 of Figure 2.

talen j a detail, sectional View taken the li e 6 6 of Figure l; and l"igure 4' is a detail,"sectional View on the line 7 7 of Figure 2. Y

En the accompanying drawings, used the reference,character 10 to generally they :trame of a tractor forming part of an excavating machine and having thecreeping Vtread structure 11.

he trontor" the device is Vmounted the 12, having its shaft connected lby talien Virt- Tillfbe supported on the frame' A :ther object is to provide such a devwhen the boom is raised 'from its suitable transmission gearing, not here shown, with a counter shaft 13.

The frame 10 has what may be called a superstructure 10a.

At the rear of the main trame at the opposite sides `thereof are supported parallel laterally spaced, outwardly opening chair nels 14 inclined from their lower ends upwardly and forwardly.

The excavating machine lis provided at its rear portion with a boom indicated Crenerally at 15 in Figure 1. The details or the boom structure are not. herein described.

At the lower end of the boom is a transverse shaft 16 and at the upper end a transverse shaft 17. On the shafts just mentioned is the usual sprocket chain and bucket excavator mechanism 18.

The boom ismounted'for lateral adjustment in a manner not particularly pertinent to the present device.

l provide between the ends of the boom a transverse I-beam 19 under the boom as shown in Figure 5, and above it a transverse angle bar L2O above the boom. .The boom may slide bet-Ween the Ibeam 19 and the angle 2O laterally in the machine, and is thus moved by mechanism not herein particularly otherwise referred to.

The ends or' the I-beam 19 and angle 20 are connected by a channel beam 21. The channel beam 21 and the boom holding and supporting -beam 19 and angle bar 20 are supported for sliding adjustment and for limited rocking movement on the channels 14 in the following manner: 4

Secured to the channels 21 and preferably to the ends of the I-beam 19 at opposite sides of the device are plates 22 from which trunnions 23 project laterally. Journal sleeves 2 are mounted on the trunnions 23 and rest on top of the channels 1el, as illustrated in Figure :5.

" The lower surfaces ot the journal sleeves 24 are flat, as art- 25, to rest on the channels 14 andv are preferably provided with shoulders 26 to lit the inner i'a-ces of the channels as shown in said ligure.

'v means of a pin`31.

ear 32. The .ears 32 and theplate 2?' in each l() By tightening the nuts 34 on the bolts 3 3,- theboom can be locked to thechannels 1 4.

against the journal sleeve 24 for drawing vthe flange 28 snugly into engagement with the upper surface of the flange or channel 14.

On the end of eachjournal24,a collar 30. is locked. adjacent to the plate Q {by- The journal'sleeve 24, as shown in Fig# ure 6, Vis .provided on veach side with an instance are'fastenedftogether on opposite: sides of the journal sleeve byjmeans of bolts By loosening the nuts `34 or leaving them so that, ther parts .are not tooV tightly, fries tionally engaged, it ywill be seen .that the boom can be lslid up and'down onthe channels 14. 'Y For accomplishing this raising and lowering of the boom, l provide the following means:

A transverse shaft 35 shown in Figures 1 and 2, is mounted on the `lower part ofthe frame 10 in the bearings 36.

On'the'sha *ts 13 and 33 onwhich travels a sprocket chain 39,

" whereby motionV is transmitted from the shaft-13 to the shaft 35. "The gearing inechanisinf just described ist covered byv a gear casing 40.

the sha mounted arms 41V extending' u awardl ,in

. Z3 u Y tlievmachine and having the shafts 17 journaled'inV their upper ends.y Supportedon the Varms 41ersv brackets 42, which support pulleys (See Figure 1.)

` truiinions 23'.V

Mounted on the upper, forward partlof vthe framejis transverse shaft 44 on theends' of which are drums 45 (see Figures 1 and 2). Cables'46 are wound on thedr'ums 45v extended around thepulleys 43 and ses curedtoafbar or the like 45a-on1the main frame of the machine.

It will be noted that the center of gravity of the, boom is rearwardlyv and below the lt `will therefore be seen that by winding and Vunwinding the cables 46V on the drums 45, the boom lmaybe raised or lowered.

l provide the'followine means for operating the shaft 44 andtheldrums Cin the shaft 35 are vloosely ,n'iounted the spaced beveled gears or pinions47 and 48,

*whichfare held Vagains1; moveniieiit away fronieeach otherby collars 49 fixed on the "'A bracket 50- is fined onthe-main frame and'hasfa .shaft44 journaledin it. A On the shaft 44l inthe vbracket 50 a worm wheel Til@ b1; als() servesl as a casing. Y v I and has on it a worin 53 meshing withy the ywormV wheel 51. On the lower end ofthe and 35 aresprockets37- 535 near the ends 'thereof are.

A shaft 52is journaled inthe braeket'50'y shaft `52 isa beveledV pinion or gear 54, which meshes withV they respect-ive beveled gears 47 and 48.

Referring nowfto Figure' 3, it will Vbe ob- "servedz that formed on the adjacent faces of the beveled gears 47. and 48 are clutch el'en'ients 55. A double-ended clutch' niember 56 is slidably but non-rotatably mounted on the shaft35 between the gears 47 and 48.

A clutch actuating arm 57 is fixed on a short shaftv58 and is operatively 'connected with the clutch member 56 inthe' usual manner to permit the arm to slide the clutch element on the shaft andv yet permit theclutch element to rotate with the shaft.

. On theshaft 5S is a clutchactuating lever 44 is rotated in one direction from the shaft 52,'the cables 4(3ar'e unwound from the drums 45 for allowing the'booin to slide downwardly and rearwardly.

TWhen the .sha-ft' v44 is opera-ted for ro tating it in the opposite direction, theidrums 45 ,are rotated in lthe vother direction for winding up the cables for raising the boom.V

On the shaft 35 isa `sprocket 60.

rlhe lowerend of the shaftk 52`is journaled Yin a'bracket .afsupported on'tlie main frame 10, asshowii for example in'Figiiie 7.'

n thesame vertical plane with the spooket 60 is a sprocket 61 (Figure 1) fixed on the shaft 17. `f y A chain 62.(Figures 1 andQ) travels on the sprockets 60 and 61.1

`An `enclosingcase"63 for the greater vpart of the chain 62 issupportedf on oneofthe arms41.Y

Motion -is transmitted through the sprockets @Gand 61and chain62 frorii the `'shaft 35 to the shaft r17 for actuating' the chain and bucket excavator mechanism.

. lt will be understood'that I have not'here attempted to describe any of the parts or `iechan'ism of the excavating machinery, except those necessary for illustrating` the con.- struction and 'operation of theV boom hoist device and connecting parts.r

ies

In the practical operation'of the boomvv hoist, assuming that the part-sare in the po sitionshown in .full-,lines` vin 'Figure 1 with the boom i'aised, it' will noted that' vby properly moving the clutchcontrol'lever 59,

^ the shaft 58 willbe rocked for swinging the 'armV 5T and thus throwing the clutch element 56 into inoperative Vengagement' with one of the pinions 47 or 48 on the'shaft 35.

Weight Will cause it to slide dovvn the channels..

Since the trunnions 23 move in straight lines parallel with the channels 1% and the shaft 17 moves in the arc of a circle having its center at the center ci the shaft 35, the

boom Will not only slide downwardly but Will be given avtilting movement, whereby its rear end is relatively lowered until theV boom comes more nearlyinto Vparallel with the channels le. Y Y

' W' hen the boomv has been lowered to the Vposition for digging, the excavating opera- Vtlonfis commenced* and the boom can be lowered into the ground as the ditch ma le,

as far as is desired the lowering movement`v being, ot course,`liil nec the machine;

Alter the ditch has been started, the boem may, itl desired, and if the nature or the groundY being excavated requires it, be locked to the channels le onthe main frame by tightening the nuts on the bolts (See by the capacity et l Figure 6.)

. function.

'Vfhen it is desired to raise the boom out of theground lor moving the excavator to some other location, the boom is unlocked from the channels 14, if it has been so locked, and the boom hoisting mechanism is put in operation by proper manipulation of the lever 59 for Winding the cables on the drums l5 and pulling the boom upwardly.

Insomnch as the trunni'ons 3 travel upwardly along the inclined channel beams 14, whereas the shaft 17 travels on the arc of the circle aforesaid, it Awill be noted that as the boom approaches its upward limit ot movement,"it istilted so as to lift its rear end away trom'the ground. VThis makes it possible to raise and-lower the boom with a minimum ot movement.

.lt also maires possible a convenient method or"v operating the chain and Vbucket excavating ,mechanismV from the shaft at the upper edge of the boom, :which isalways the same distance from the shai't'.

vlt also accomplishes another important ln excavating which the boom' is mounted at the rear or" theY main frame and is raised or lowered, some diiiiculty is encountered due to the fac that the boom imposes a' great Weight at one end of the machine, so that Vit is sometimes diliicultY to prevent the machine from mechanism on said boom, a power sh ff: having its longitudinal axis in line with the machinery of this tfpe in hill.

the boom puts the center of gravitv ot the boom more nearly over the center et the base formed by the main trame and the traction means, such as the endless tread device l1, and Vthusreduces the danger ot upsetting the machine rlhe mechanism ttor hoisting and lowering the boom is ot comparatively simple ionstruction and in the machines in operation has been found durablel and elicctive.

Changes may be made in the details o the construction and arrangement ot' my improved boom hoisting structure, and it, my purpose to cover by the claims which may be allowed to nie and become apart. ot the patentto be issued upon this application any modified forms of structure or arrangement of parts, which may be included within the scopcol such claims and ot' my real invention.

l claim as my invention:

l. ln a cevicl of the class described, an excavating machine 'trame having at one end ixed parallel inclined supporting beams, a boom'mounted oil-center :trom end to end for :lidingv and pivotal movement on said beams, arms pivoted to the main traine and pivotal to one end or" the boom, a drum 1 structure mounted onthe mainy irame, cable means Wound on the drum structure and secured at one end to the main trame, said boom and arm device having pulley mez-.ns through which said able means coact.

2. 'ln a device of the class described, an excavating machine frame having at one end parallel inclined supporting beams, boom mounted oil-center from end to end for sliding and pivot-al movement on said beams, arms pivoted to the main frame and pivoted to one end ot the boom, a drum structure mounted on trie main trame, cable m-,ans Wound on the drum structure and secured at one end to the main trame, said boom and arm device having pulley means through.

which said cable means coact, and excavativot axes ot the on the main frame and means for operating said drum structure and excavating mechanism from said shalt.

B. ln aA structure oi' the classdescribed, a main iframe, parallel inclined` supporting beams at one end thereof, a boom mountei'l on saidbeams for sliding andV pivotal vmovement for permitting the boom to be raised and lowered into and out the ground over which the main frame' has traveled, a povver shift supported on'the main trame, pair of arms pivoted to the main frame in line with the axis of said shaft, and pivotally connected with the upper end oi lthe boom,

lVith my device, the tilting movement otand means for rocking said armsforimparting sliding and tilting movement to the;

boom. l

` il. In a structure Yofthe class described, a main frame, parallel inclined supporting ,beams at one end thereof, a boomgmounted off-center longitudinally on saidbeams for slidingandpivotal movement for permitting the boom to vbe raised and lowered into and out-of the ground oveifwhich vthe main frame has traveled, apower shaft supported v .on tlief main frame, a pair of arms pivoted to the main frame in linegwith the of said shaft,vand pivotally connected with the upper end of thelboom, means for rocking said arms for imparting sliding and tilting drums from said shaft, an excavating mechanism carried by said boom, and means for operating said excavating mechanism from said shaft.

v5. In a device of the vclass described,

'spaced parallel beams 4having flanges, a

boom, means .for mounting the boom yonthe `beams for sliding and ypivotal movement,

comprising trunnions connected with the boom, journal sleeves on the trunnions resting on the-beams for sliding movement and having shoulders for engaging one side of said beams, plates mounted Von said journal sleeves havingflanges underhanging theabove-described .flanges on said beams, and

means for .drawing said flanges of said plates into snug engagement with the flanges vof saidibeams v l6. Vln a device-of `the class described, spaced parallel: beams having` flanges, a

boom, means for Ymounting the .boom on the beams for sliding and `pivotal.,movement,

comprising trunnions connected with thev l.b oomjourna l sleeves on the triinnions resting on the beamsfor sliding movement and having shoulders forengaging one side of Vvsaid'beams, plates mounted on said journal sleeves having Vflanges imderlian'ginglthe above-described flanges on vsaid beams, and.;y

meansfor drawingsaid flanges off'said plates into snug engagement with theiianges j Asupportedon oneendof said frame, =spaeed of said beamsin two directions.

7. In Va device of'tlie v'class described,

Yspaced vparallel `.beams having flanges,"a

iboom, means for mounting the boom onfthe beams for` sliding ,and .pivotal movement, l

"comprising trunnions connectedwith the sleeves having j flanges underhanging the above-described'flangeson said beams, and:

- boom, journal sleeves on the trunnionsfrest- `ing on the beams forvslidi'ng movement vand having shoulders for engaging one -side of said beams, plates mounted on said journal means for' drawing said flangesof said plates into snug" engagement with the flanges` of said beams inI two` directions, said last means being adjustable so that theoperbeamsby the swinging/movement ofvsaid Y arms it will alsobe tilted'tofdifferent angles. Y

9. In a device -of the class described,.a frame, a pair of beams at the rear end thereof inclined from .their lower ends upwardly and forwardly, a boom, means Vfor mounting said boom offcenter on said gbeams'for sliding and pivotal movement thereon, said means comprising tiunnions projecting from `the boom, journals; for the trunnions slidably mounted on the beams, andfnieansfor detachably locking the journalsgto the beams, a pairof armszpivotedon the forward' portion of said frame, fritransverse shaft V'at the upper end of said .boom, said arms being pi'voted on said shaft, and means for. actuating said arms whereby when the; boom is 1 slidon said beams 4b-y the -swingingmovement of said arms-it will also, be tilted to different angles.

)10g In a machine of the` class described, the combination of a frame, a power plant supportedon one end of said frame, spaced beams on the other Yen'dfof said frame -inclined from the endof the kframe upwardly land forwardly, a boom pivotally: and slidably inountedon sa-idiinclined beams, a shaft 35, vand means actuated from.' the' power plant for swinging theuppee end. of .the booinin a` limited; arc aroimd the axisof said Vshaft Vfor thus tilting and slidingthe boom, said means( incluldingarmsfpivoted Vat one end axially of said shaft and at the :other end to said booninear one end thereof.

11.ln Aa machine ofthe class: described,

ythe combination of-aI frame, a power plant beainson tlieother end of ysaid' frame inclined from the end ofthe frame upwardly and forwardly, a boom-,'pivotallyand,slidplant for swinginggthefupper end ofthe boonim-,a limited are aroundthe airisgof; said shaft for thus vtiltingand sliding the boom, said means including arms pivot'ed at one end axially of said shaft andat the other :end to said booiiifnearfione end thereofa worm gear structure'adaptedto y:internatiably, mounted V.on said inclined beams, a .shaft 35, and means actuatedfromthe power cally lock the boom in any of its raised shaft 44, a drum and cable mechanism for connecting said shaft with the ripper end of the boom, a shaft 35, a shaft 52, a reverse gear mechanism for operatively connecting the shafts 35 and 52, and a worm and worm wheel, means for transmitting motion from the shaft 52 to the shaft 44, whereby the shaft 44 may be rotated in either direction y and will be automatically locked when the shaft 52 is not in motion.

13. ln a device of the class described, the combination of a. supporting frame having a power plant in one end thereof, a boom mounted on the other end of said frame for sliding movement in an inclined plane and for pivot-al movement in a vertical plane, a shaft 44, a drum and cable mechanism for connecting said shaft with the upper end of the boom, a shaft 35, a shaft 52, a reverse gear mechanism for operatively connecting the shafts and 52, and a worm and worm Wheel, means for transmittingT motion from the shaft 52 to the shaft 44, whereby the shaft 44 may be rotated in either direction and will be automatically looked when the shaft 52 is not in motion, and means for maintaining a transverse axis through the upper end of the boom parallel with the shaft 35 in all sliding and pivotal positions of the boom.

14. In a structure of the class described, the combination of a tractor having a frame having a power plant supported on one end of said frame, a boom mounted at the other end of the frame for sliding movement in an inclined plane and for pivotal movement in a vertical plane, the pivotal axis of said boom being above its center of gravity from end to end, a shaft operatively connected with the power plant, and means for swinging the upper end of said boom around the axis of said shaft, excavating mechanism on the boom, whereby the boom may be raised and lowered and tilted by power from the power plant and when the boom is in operating position the excavating mechanism will be crowded against the work.

15. ln a structure of the class described, a main frame, parallel inclined supporting beams at one end thereof, a boom mounted off-center on said beams for sliding and pivotal movement for permitting the boom to be raised and lowered into and vout of the ground over which the main frame has traveled, a power shaft supported on the main frame, a pair of arms pivoted to the main frame in line with the axis of said shaft, and pivot-ally connected with the upper end of the boom, and means for simultaneously sliding said boom and swinging said arms.

Des Moines, Iowa, January 13, 1926.

GEORGE A. VAUGHN. 

